Oracle Coherence for C++ API


ReflectionUpdater Class Reference

#include <coherence/util/extractor/ReflectionUpdater.hpp>

Inherits Object, ValueUpdater, and PortableObject.

Inherited by TypedUpdater, and TypedUpdater< AH::ValueType::BoxedType, C, M, coherence::lang::BoxHandle< AH::ValueType >, OH >.

List of all members.

Detailed Description

Reflection-based ValueUpdater implementation.

Local execution of a ReflectionUpdater is dependent upon target class and method having been registered with the SystemClassLoader. For cases where the registration has not been performed or is not possible locally executable C++ updaters may either be custom built, or auto-generated using the TypedUpdater<>.

djl/mf 2008.04.08
See also:



Public Types

typedef spec::Handle Handle
 ReflectionUpdater Handle definition.
typedef spec::View View
 ReflectionUpdater View definition.
typedef spec::Holder Holder
 ReflectionUpdater Holder definition.

Public Member Functions

virtual void update (Object::Handle hTarget, Object::Holder ohValue) const
 Update the state of the passed target object using the passed value.

hTarget the Object to update the state of
ohValue the new value to update the state with
ClassCastException if this ValueUpdater is incompatible with the passed target object or the value and the implementation requires the passed object or the value to be of a certain type
Exception if this ValueUpdater encounters a checked exception in the course of updating the target object
IllegalArgumentException if this ValueUpdater cannot handle the passed target object or value for any other reason; an implementor should include a descriptive message

virtual void readExternal (PofReader::Handle hIn)
virtual void writeExternal (PofWriter::Handle hOut) const
virtual bool equals (Object::View v) const
virtual size32_t hashCode () const
 Return a hash code value for the Object.

This method is supported for the benefit of hash-based containers.

The general contract of hashCode is:

  • Whenever it is invoked on the same Object more than once during an execution of an application, the hashCode method must consistently return the same value, provided no information used in equals comparisons on the object is modified. This value need not remain consistent from one execution of an application to another execution of the same application.
  • If two Objects are equal according to the equals method, then calling the hashCode method on each of the two Objects must produce the same value.
  • It is not required that if two Objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct results. However, the programmer should be aware that producing distinct results for unequal objects may improve the performance of hash-based containers.

The default implementation is identity based.

a hash code value for this Object

virtual void toStream (std::ostream &out) const
 Output a human-readable description of this Object to the given stream.

coherence::lang::operator<<(std::ostream, Object::View) is defined and will call into the toStream method, to output Objects. If a managed String object is desired, the COH_TO_STRING macro can be used to build up a String from streamable contents.

 Object::View vKey   = ...
 Object::View vValue = ...
 std::cout << vKey << " = " << vValue << std::endl;

 String::Handle hs = COH_TO_STRING(vKey << " = " << vValue);

out the stream used to output the description

virtual String::View getMethodName () const
 Determine the name of the method that this extractor is configured to invoke.

Protected Member Functions

 ReflectionUpdater ()
 Construct an empty ReflectionUpdater (necessary for the PortableObject interface).
 ReflectionUpdater (String::View vsMethod)
 Construct a ReflectionUpdater for a given method name.
 ReflectionUpdater (const ReflectionUpdater &that)
 Copy constructor.

Protected Attributes

MemberView< Stringm_vsMethod
 The name of the method to invoke.
MemberView< Methodm_vMethod
 The resolved Method.

Constructor & Destructor Documentation

ReflectionUpdater ( String::View  vsMethod  )  [protected]

Construct a ReflectionUpdater for a given method name.

This implementation assumes that the corresponding classes will have one and only one method with a specified name and this method will have exactly one parameter.

Member Function Documentation

virtual String::View getMethodName (  )  const [virtual]

Determine the name of the method that this extractor is configured to invoke.

the name of the method to invoke using reflection

The documentation for this class was generated from the following file:
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